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THE NITROGEN ISOELECTRONIC TRAP IN PHOSPHORUS‐RICH GALLIUM ARSENIDE PHOSPHIDE
1.D. G. Thomas, J. J. Hopfield, and C. J. Frosch, Phys. Rev. Letters 15, 587 (1965).
2.R. A. Faulkner, Phys. Rev. 175, 991 (1968).
3.J. C. Phillips, Phys. Rev. Letters (to be published).
4.P. J. Dean, J. D.Cuthbert, and R. T. Lynch, Phys. Rev. (to be published).
5.A preliminary report of an investigation of this effect in is given by G. W. Iseler and A. J. Straussin Bull. Am. Phys. Soc. 13, 404 (1968).
5.It is difficult to draw quantitative conclusions from this work about the dependence of the O binding energy on x. The problem is that the nonlinear variation with x of the energy gap of discussed by Iseler and Strauss may be an artifact due to an impurity tail to the conduction band of ZnTe induced by the Se atoms, an effect which has been reported in CdS:Te by J. D. Cuthbert and D. G. Thomas, J. Appl. Phys. 39, 1573 (1968).
5.In the present work the variation with x of both the energy gap and the energy of the N bound exciton line in was determined from optical absorption measurements. A linear variation in both was found for
6.The vapor growth of GaP by the wet transport method has been discussed by C. J. Frosch, J. Electrochem. Soc. 111, 180 (1964);
6.and by W. C. Ellis, C. J. Frosch, and R. B. Zetterstrom, J. Cryst. Growth 2, 61 (1968).
7.P. J. Dean, G. Kaminsky, and R. B. Zetterstrom, Phys. Rev. (to be published).
8.The solid curve labeled in Fig. 1 is consistent with data of D. A. Cusano, G. E. Fenner, and R. O. Carlson, Appl. Phys. Letters 5, 144 (1964).
9.I. Balslev, Phys. Rev. 173, 762 (1968).
10.J. C. Phillips, Phys. Rev. Letters 20, 550 (1968).
11.J. C. Phillips, Ref. 3, and private communication. The argument is that at the edges with smaller deformation potentials electronegativity differences produce a large central cell potential, whereas at edges with larger deformation potentials lattice distortions cancel much of the effects of electronegativity differences.
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